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Todd Blomstrom, PE <br />May 6, 2020 <br />Page 4 <br />Summary and Recommendations <br /> <br />The cores obtained within the Arden Oaks area had bituminous depths ranging from 5.75 inches <br />to 7 inches, with at least 3 inches of underlying aggregate base. Three of the cores were in good <br />condition, while the others exhibit distresses such as delamination or deterioration. The cores <br />had a top lift of 1.5 inches, 2 inches, or 2.5 inches. The surface of the streets (excluding the <br />segment where Core 9 was obtained) was observed to be in poor condition covered in extensive <br />amount of cracking and patching. <br />Based on the findings from pavement coring, it would be feasible to perform a partial depth mill <br />and overlay on Arden Oaks Drive (excluding the segment where Core 1 and Core 2 were taken). <br />It would be recommended to extend the milling depth beyond the depth of the top lift of the <br />existing bituminous pavement to ensure proper bonding between the new overlay and the <br />underlying existing asphalt. Core 4 showed raveling between pavement lifts, thus, we would <br />recommend the City to account for spots that may need additional patching. <br />It is important to note that a partial depth mill and overlay will not eliminate all the crack patterns <br />within the pavement. Cracks will reflect through the new overlay within a few years. That said, in <br />order to extend the service life of this preservation method, we would recommend the City to <br />conduct routine crack sealing. Crack sealing is a cost-effective method to prevent infiltration of <br />water and incompressible material into the cracks. <br />Along the segment where Core 1 and Core were taken, it would be recommended to perform a <br />full depth reclamation (FDR). It is our understanding that there were base issues along this <br />segment where water is seeping out through the bituminous pavement. An FDR would be able to <br />help address the base issues. This rehabilitation method would also remove all the existing <br />distresses, and re-blend the bituminous and a portion of the aggregate as a base to re-pave over, <br />essentially creating a new roadway section. <br /> <br /> <br /> <br /> <br /> <br />DRAFT REPORT <br />7-8-2021